David H. Halvorson

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Cedar Rapids, IA, US

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Patents Grantslast 30 patents

Information Patent Grant
Apparatus and method for detecting railroad locomotive turns by mon...
- Patent number 6,377,215
- Issue date Apr 23, 2002
- WABTEC Railway Electronics
- David H. Halvorson
- B61 - RAILWAYS
Information Patent Grant
Method and apparatus for controlling trains by determining a direct...
- Patent number 6,360,998
- Issue date Mar 26, 2002
- Westinghouse Air Brake Company
- David H. Halvorson
- B61 - RAILWAYS
Information Patent Grant
Electronic air brake control system for railcars
- Patent number 6,273,521
- Issue date Aug 14, 2001
- Westinghouse Air Brake Technologies Corporation
- David H. Halvorson
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Method and apparatus for improving railcar visibility at grade cros...
- Patent number 6,208,246
- Issue date Mar 27, 2001
- Wabtec Railway Electronics, Inc.
- Jeffrey D. Kernwein
- B60 - VEHICLES IN GENERAL
Information Patent Grant
Method and apparatus for determining railcar order in a train
- Patent number 6,114,974
- Issue date Sep 5, 2000
- WABTEC Railway Electronics
- David H. Halvorson
- B61 - RAILWAYS
Information Patent Grant
Method and apparatus for determining railcar order in a train
- Patent number 5,986,579
- Issue date Nov 16, 1999
- Westinghouse Air Brake Company
- David H. Halvorson
- B61 - RAILWAYS